System is simple enough.
3xSPA303G phones. 2xFXO trunk. 1xSIP trunk.
Nothing else !
Incoming call from FXO line goes to extension 101, she starts to talk than after a few seconds, the voice goes away. When she hangs up, all the phones reboot. Reason of reboot shows "SIP triggered" on all phones. This happens all the time and everytime there is a call from FXO.
Also when there is an incoming call from the FXO line and is forwarded to again ext 101, but Extention 100 <grpick> the call, there is no problem !
Logs are attached.
This problem is killing us. Someone please help !